This project used an ESP32-based TTGO microcontroller dev board to create a graphical display for a basic Geiger-Müller counter module. The display is powered by a 3.7V LiPo pouch cell, which uses the integrated controller to charge via USB C. The counter features buttons to adjust the scaling of the graph, and the length of the rolling average, enabling the user to choose between increased response time or accuracy.
In 2020 the counter was taken to the Caples to prospect for uranium deposits, considering the historical deposits found in Buller Gorge, however no elevated levels could be detected with the relatively crude detector.
